Remove CSS code

I have the word "edit" and a white line with a small diamond appearing on my site pages.

<a class="post-edit-link" href="https://tonycazeau.com/wp-admin/post.php?post=343&action=edit">Edit</a>

<a class="post-edit-link" href="https://tonycazeau.com/wp-admin/post.php?post=2459&action=edit">Edit</a>

<img alt="" src="https://tonycazeau.com/wp-content/themes/strings/images/mini_divider_n.png">

<img alt="" src="https://tonycazeau.com/wp-content/themes/strings/images/mini_divider_n.png">


I can't recall placing them on the site, but can't delete them.

https://tonycazeau.com